SN74HC594DWR Equivalent & Substitute Parts

Part Overview

The SN74HC594DWR is an 8-bit shift register manufactured by Texas Instruments, designed for serial-to-parallel data conversion applications. This device is currently in active production status and is widely used in digital logic circuits requiring shift register functionality. The need for equivalent and substitute parts arises from supply chain considerations, packaging preferences, and operational temperature requirements across different application environments.

Substiute Parts

SN74HC594DWR

Texas InstrumentsIn Stock: 3149SN74HC594DWR Datasheet

Current PartRFQ

74HC594D,112

Nexperia USA Inc.In Stock: 119274HC594D,112 Datasheet

MFR RecommendedRFQ

74HC594D,118

Nexperia USA Inc.In Stock: 2824374HC594D,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC594DWR is determined by the following critical parameters:

• Logic Type: Shift Register (must match)
• Number of Bits per Element: 8 (must match)
• Function: Serial to Parallel capability (must match)
• Output Type: Push-Pull (must match)
• Voltage - Supply: 2V ~ 6V (must match)
• Mounting Type: Surface Mount (must match)
• RoHS Status: ROHS3 Compliant (must match)

The identified substitute parts maintain these core electrical and mechanical specifications. Variations in packaging format (Tape & Reel versus Tube) and operating temperature range do not affect functional equivalence but may impact application suitability based on environmental requirements.

Parameter Comparison

Engineering Selection Recommendations

74HC594D,118 (Nexperia USA Inc.) is the primary substitute for the SN74HC594DWR. This part maintains active product status, is available in Tape & Reel packaging, and provides an extended operating temperature range of -40°C to 125°C. The wider temperature specification ensures compatibility with applications requiring operation beyond the standard -40°C to 85°C range. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings.

74HC594D,112 (Nexperia USA Inc.) is an alternative substitute with equivalent electrical specifications. However, this part carries an obsolete product status and is supplied in Tube packaging rather than Tape & Reel format. Selection of this part should be limited to applications where supply chain continuity is not a primary concern and where Tube packaging is acceptable for assembly processes.

Both substitute parts exhibit expanded functional capability, supporting Serial to Parallel and Serial functions compared to the main part's Serial to Parallel specification. This expanded functionality does not restrict their use as direct substitutes.

Frequently Asked Questions (FAQ)

Q: Can 74HC594D,118 be used as a direct replacement for SN74HC594DWR?

A: Yes. Both parts share identical core electrical specifications: 8-bit shift register configuration, Serial to Parallel function capability, Push-Pull output type, 2V to 6V supply voltage range, and ROHS3 compliance. The 74HC594D,118 provides an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) and is supplied in Tape & Reel packaging, matching the original part's format.

Q: What is the difference between the two substitute parts?

A: The primary differences are product status and packaging format. The 74HC594D,118 is in active production and supplied in Tape & Reel format, while the 74HC594D,112 is obsolete and supplied in Tube format. Both maintain identical electrical specifications and RoHS compliance.

Q: Are there package dimension differences between the main part and substitutes?

A: Yes. The SN74HC594DWR uses a 16-SOIC package with 0.295" (7.50mm) width, while both substitute parts use a 16-SOIC package with 0.154" (3.90mm) width. Both are surface-mount 16-pin SOIC packages and are mechanically compatible with standard PCB layouts designed for 16-SOIC components.

Q: Does the extended temperature range of the substitutes affect compatibility?

A: No. The extended operating temperature range of -40°C to 125°C in the substitute parts is a superset of the main part's -40°C to 85°C range. Parts with wider temperature specifications are fully compatible with applications designed for the narrower range.

Q: What is the significance of the "Obsolete" status for 74HC594D,112?

A: Obsolete status indicates that the manufacturer has discontinued active production. While the part may remain available through existing inventory, long-term supply cannot be guaranteed. For new designs or applications requiring sustained component availability, the active-status 74HC594D,118 is the preferred choice.